单选题深Ⅱ°烧伤的深度

单选题血液中甲状腺素与血清蛋白结合，其中

单选题女性，50岁，脐周痛12小时，扩散至全腹痛2小时，右侧腹部压痛，反跳痛，肌张，尤以有下腹为显著，结肠充气试验(+)，腹部透视无异常，白细胞：2.06×109/L中性0.87，尿红细胞2～4个/HP。应考虑A．急性胰腺炎B．急性胆囊炎C．右侧输尿管结石D．右侧输卵管妊娠破裂E．急性阑尾炎穿孔

单选题盆腔位阑尾炎导致的临床症状是

单选题直肠周围脓肿的治疗是（ ）

单选题A．杯口征或弹簧征 B．鸟嘴征 C．铅管征 D．线样征

单选题关于骶椎麻醉(骶麻)下列哪项是正确的

单选题骨关节结核病人需要手术病灶清除时，应该

单选题下列关于自体输血的描述，错误的是

单选题高压蒸气灭菌对灭菌物品的要求为压力104．0～137．3kPa

单选题临床型肾结核绝大多数是A．双侧性病变B．腰痛症状显著C．全身症状突出D．尿毒症症状明显E．尿频、尿急、尿痛为主要表现

单选题早期胃癌的有效治疗方法是

单选题关于消化性溃疡的治疗，下列哪项是不恰当的

单选题Crohn病最多见于（ ）

单选题硬膜外麻醉穿刺操作时不慎刺破硬脊膜，术后最容易出现

单选题On the first Earth Day, the U.S. was a poisoned nation. Dense air pollution blanketed cities like Los Angeles, where smog alerts were a fact of life. Dangerous pesticides like DDT were still in use, and water pollution was rampant—symbolized by raging fires on Cleveland's Cuyahoga River. But the green movement that was energized by Earth Day— and the landmark federal actions that followed it—changed much of that. Today air pollution is down significantly in most urban areas, the water is cleaner, and even the Cuyahoga is home to fish again. But if the land is healing, Americans may be sickening. Since World War Ⅱ, production of industrial chemicals has risen rapidly, and the U.S. generates or imports some 19 billion kg of them per day. These aren't the sorts of chemicals that come to mind when we picture pollution—huge plants spilling contaminated wastewater into rivers. Rather, they're the molecules that make good on the old "better living through chemistry" promise, appearing in items like unbreakable baby bottles and big-screen TVs. Those chemicals have a, habit of finding their way out of everyday products and into the environment—and ultimately into living organisms. A recent biomonitoring survey found traces of 212 environmental chemicals in Americans—including toxic metals, pesticides, etc. "It's not the environment that's contaminated so much," says the director of the Cincinnati Children's Environmental Health Center. "It's us." As scientists get better at detecting the chemicals in our bodies, they're discovering that even tiny quantities of toxins can have a potentially serious impact on our health—and our children's future. Chemicals like bisphenol A (BPA) and phthalates—key ingredients in modern plastics—may disrupt the delicate endocrine system. A host of modern ills that have been rising unchecked for a generation—obesity, diabetes, attention-deficit disorder —could have chemical connections. "We don't give environmental exposure the attention it deserves," says Dr. Philip Landrigan. "But there's an emerging understanding that kids are uniquely susceptible to environmental hazards." Washington has been slow to arrive at that conclusion. The Toxic Substances Control Act (TSCA), the 34-year-old vehicle for federal chemical regulation, has generally been a failure. The burden of proving chemicals dangerous falls almost entirely on the government. And the Environmental Protection Agency (EPA) has been able to issue restrictions on only a handful of chemicals and has lacked the power to ban even some dangerous cancer-causing substances. But change is coming. The Obama Administration is taking a closer look at chemicals. More important, Congress may finally be ready to act. "We can't permit this assault on our children's health—and our own health—to continue," says Senator Frank Lautenberg.

单选题哪种情况下禁忌使用γ羟丁酸麻醉

单选题腹部闭合性损伤手术探查时发现横结肠系膜根部有较多气泡，应高度怀疑的创伤是

单选题双侧瞳孔时大时小变化不定，对光反射消失、伴眼球运动障碍是下列哪种损伤的常见表现（ ）

单选题关于上尿路结石常用检查方法的描述，错误的是